Part of the John Deere Repair Manuals.
This is the John Deere factory repair manual for the 6120, 6220, 6320, 6420, 6120L, 6220L, 6320L, 6420L and 6520L tractors. At 1,904 pages it covers every system you will pull apart on these machines: engine removal and reinstall, all four transmission options the 6020 series came with (SyncroPlus, Power Reverser, AutoPowr/IVT and PowrQuad/AutoQuad), the drive train from U-joint shafts to final drives, hydrostatic steering, hydraulic pump and rock shaft, the full electrical system with wiring harness diagrams, and the cab with air conditioning. Factory torque specs, adjustment dimensions and test pressures are listed throughout so you torque every fastener to spec on the first pass.
Complete the set for your 6120-6520L
- Operation & Tests: John Deere 7220, 7320, 7420 and 7520 Tractor Diagnosis and Tests Manual
- Repair Manual: John Deere 7220, 7320, 7420 & 7520 Tractor Repair Manual
What's Inside This Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | Specifications, Tune-Up, Predelivery Inspection | |
| Engine | Installing and Removing Engine Components | |
| Fuel, Air Intake, Cooling and Exhaust | Speed Control, Fuel System, Air Intake System, Cooling System, Cold-Weather Starting Aid, Exhaust System | |
| Electrical System | Connectors, Wiring Harnesses, Charging Circuit, Starter Motor Circuit, Fuses/Relays/Switches, Monitoring Systems, Electrical Components | |
| SyncroPlus Transmission | Installing and Removing Components, Transmission Shift Controls, Perma Clutch Ii Module, Gear Transmission | |
| Power Reverser Transmission | Installing and Removing Components, Transmission Shift Controls, Power Reverser Module, Gear Transmission | |
| AutoPowr/IVT Transmission | Installing and Removing Components, Transmission Shift Controls | |
| PowrQuad/PowrQuad Plus/AutoQuad Transmissions | Installing and Removing Components, Shift Controls, PowrQuad Module, Creeper Transmission, Option Transmission, Range Transmission | |
| Drive Systems | U-Jointed Shafts and Torsion Damper, Front-Wheel Drive Clutch, Differential, Hydraulic Pump Drive, Final Drives, Rear PTO, Front PTO, Front Implement Drive | |
| Steering and Brakes | Hydrostatic Steering, Steering Cylinder, Brake Valve, Rear Brakes, AutoTrac | |
| Hydraulic System | Controls, Hydraulic Pump and Charge Oil Pump, Valves, Rockshaft, Selective Control Valves and Couplers, Independent Control Valve (Icv) | |
| Frame, Axle and Wheels | Main Frame, Front Axle, Front and Rear Wheels/Fenders, Trailer Mounting/Swinging Drawbar, Triple Link Suspension (TLS) | |
| Operator's Cab | Controls and Instruments, Air Conditioning System, ClimaTrak, Heating System, Seats, Cab Structure, Low-Clearance Cab, Cab Suspension | |
| Special Tools | Dealer-Fabricated Special Tools, Tools Available From the Dealer |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 6120, 6220 | ||
| Engine (4-cylinder models) | John Deere 4045TL056 diesel | |
| 6320, 6420, 6120L-6520L | ||
| Engine (6-cylinder models) | John Deere 6068 diesel | |
| All models | ||
| Slow idle - mechanical actuation | 875 plus or minus 50 rpm | |
| Slow idle - electronic actuation (above 20 deg C) | 850 plus or minus 10 rpm | |
| Fast idle - mechanical actuation | 2460 +50 rpm | |
| Fast idle - electronic actuation | 2460 -10/+20 rpm | |
| Rated engine speed | 2300 rpm | |
| Engine mounting screws torque | 100 N.m (74 lb-ft) | |
| Front engine supports to main frame torque | 95 N.m (70 lb-ft) | |
| U-joint shaft to input flange torque | 135 N.m (100 lb-ft) | |
| Cooling system test pressure | 50 to 60 kPa (0.5 to 0.6 bar / 7 to 8.7 psi) | |
| Radiator cap pressure valve opens at | 70 to 90 kPa (0.70 to 0.90 bar / 10 to 13 psi) | |
